Locking mechanism.



H. TRAVIS.

LOCKING MECHANISM.

APPLICATION FILED MAY 10, 1916.

Patented J uly 24, 1917.

2 SHEETSSHEET I.

INVENTOH ATTORNEY INVENTOR Patented m 24, 1917.

2 SHEETSSHEET 2 H mvxs LOCKING MECHANISM. APPUCATION FILED MAY 10, l9l6- ATTORNEY WTTED .3TATE3 PATEN T UFFTQE.

HIRA TBA E, F GL V B ILLE EW O K- nooKnve MECHANISM.

Application filed May 10, 1 916.

To all whom it may concern:

Be it known that I, I-IIRAM 'TRAVIS, a citizen of the United States, residing at Gloversville, in the county of Fulton and State of New York, have invented certain new and useful Improvements in a Locking Mechanism, of which the following is a specification.

My invention relates to a fire door for elevators and the like and has more particular reference to a locking mechanism provided therefor.

An object of the present invention is to provide a locking mechanism which, when the elevator is not in position to be entered through said door, maintains the door in the locked and closed position and thereby prevents persons from falling down the elevator shaft.

A further object resides in providing a door construction which is so arranged that the hanging or mounting means for the door will normally maintain the latter in a closed position.

Another object resides in the particular locking mechanism and means for operating the same.

With the above and other objects in view, I will now proceed to describe one specific embodiment of the present invention which I have shown by way of illustration in the accompanying drawings wherein:

Figure 1 is an exterior elevation of the door and its mounting.

Fig. 2 is a rear elevation of the door.

Fig. 3 is a detail view, in elevation, showing the locking mechanism for the door, and

Fig. 4 is a sectional view on the line 44 of Fig. 3.

In detail:

The device, as shown, is applied to the elevator door opening in a wall A and the door 1 forms a closure therefor. The door 1 is mounted, by means of brackets 2 and rollers 3, on a track 4 which may be of any suitable type. The track 4 is sloped toward the opening so as to permit the door 1 to close by gravity when the locking means to be hereinafter described is disengaged from locking engagement with the door. The door 1, on its rear face, as shown in Fig. 2, is provided with two strips 5 and 6, respectively, which have the bolt recesses 7 and 8.

On the wall A at right angles to the door 1, is mounted a casing 9 secured in place by Specification of Letters Patent.

Patented July .24, 1917.

Serial No. 96,643.

bolts 10 having suitable nuts 11 thereon, said bolts preferably being disposed through lugs 12 provided on the casing 9 for that purpose. WVithin the casing 9 are the cars 13 and 14 apertured as shown at 15 and 16, respectively, to receive the bolts 17 and 1.8 which are adapted to be projected through openings 19 and 20 in the casing 9 for engagement with the bolt recesses 7 and 8 as will be hereinafter described.

The bolts 17 and 18 have reduced end portions or spindles 20 and 21 which extend through bifurcated ends 22 and 23 of a beam 24 pivoted to the casing 9 intermediate the ends of the beam as shown at 25. Coir fined on the spindles 20 and 21 between the ends of the bolt portions 17 and 18 and the ends 22 and 23 of the beam 24, are springs 26 and 27. A spring 28 is attached at one end to the lower part of the beam below the pivot 25 and at the other end to the casing as shown at 29. This spring acts to noranally tend to force the bolt 18 in the out ward or looking position. Pivotally connected with the beam 24 above the pivot point 25 as shown at 30, is a link 31 having pivotal connection at 32 with an arm or lever 33 pivoted at 34 and having, on its lower end, a roller 35. Thus, when the arm 33 is swung about its pivotal point in the direction indicated by the arrow in Fig. 3, the beam 24 will be rocked so as to permit the bolts to move to the reverse position to that shown in Fig. 3, nuts 35 being provided on the end of each spindle of each bolt so as to permit proper engagement of the ends 22 and 23 of the beam 24 in order to move the bolts.

The elevator cage is indicated at 36 and has provided at any suitable place thereon, a cam 37 which slopes at either end and is disposed in a vertical plane. This cam is so positioned that as the elevator moves into the door opening, the cam 37 will engage the roller 35 and move the arm 33 in the direction indicated by the arrow in Fig. 3. This will act to move the bolt 18 out of the position shown in Fig. 3 and will move the beam 24 so that the spring 26 will be compressed and thus when the door 1 is slid to the open position, the bolt 17 will be projected through its casing opening 19 and into the bolt recess 7 in the door, thereby holding the door in the open locked position until it is released by movement of the elevator to another position.

7 While, in the foregoing, I have described a specific embodiment of the present invention, it is nevertheless to be understood that, in practice, I may resort to such modifica tions as fall Within the scope of the invention as defined in the appended claims.

I claim:

1. The combination with an elevator car and a sliding door; of a casing, a pair of lock bolts slidably arranged in said casing and being adapted one at a time to be projected therefrom to engage and hold said door against sliding movement, a beam pivoted intermediate its ends Within said casing, yoked portions at the extremities of said beam inclosing said bolts, a shoulder on v each bolt remote from said yoked portion,

expansion springs encircling said bolts and bearing at their ends respectively against said shoulders and yoked portions, and means actuated by said. elevator car for rocking said beam.

2. The combination with an elevator car and a sliding door; of a casing, a pair of lock bolts slidably arranged in said casing and being adapted one at a time to be projected therefrom to engage and hold said door against sliding movement, a beam pivoted intermediate its ends within said casing, yoked portions at the extremities of said beam inclosing said bolts, stops on said bolts engaging one side of said yoked portlon, a shoulder on each bolt remote from said stop, expansion springs encircling said bolts and bearing at their ends respectively against said shoulders and yoked portions to hold the latter yieldably engaged with said stops, and means actuated by said elevator car for rocking said beam.

3. The combination with an elevator car and a sliding door; of a casing, a pair of In testimony whereof I afiix my signature" in presence of two Witnesses.

vHIRAM TRAVIS.

Witnesses: V

HIRAM J. ANTHONY, CI-iAUNonY ARGOTSINGE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

